PS09 - Digital Strain Gage Chip for Weigh Scales

Block Diagram	QFN32 Package Outline

Specifications	QFN40 Package Outline
Resolution: up to 28 Bit (RMS) Max. data rate: 1kSPS Power supply voltage: 2.1 V to 3.6 V Operating temperature: -40 °C to 125 °C Current consumption: typ. 0.39 mA -max speed, 0.007 mA - low current configuration Standby current:~ 0.002 mA PSSR: 130 dB (@3,3 V) Offest Drift: 0,01ppm/K Gain-Drift: typ. 1ppm/K (Total system with 350 O Strain Gauge, 5V)
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Applications

Digital Load Cells Torque Wrenches Pressure Indicators

Solar Body Scale Single-Chip Weight Scales Weight Sensors

Legal for Trade Scale Battery Operated Scale Solar Kitchen Scale

Package Scale Calibrated Scales Postal Scales

Time to Digital Converters

Time to Digital Converters for Digital Strain Gage

Time to Digital Converters for Capacitance Measurement

Time to Digital Converters for Speed Sensors

Time-to-Digital - TDC Cookbook

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Single Chip Strain Gage Weight Measurement The PS09 is the latest member in the PICOSTRAIN product family of integrated circuits for measuring strain gauges. It represents the next step towards higher integration and improved functional density.

The PS09 takes the full advantage of the PICOSTRAIN digital measuring principle and allows very compact and cost effective designs with very few external components. It is perfectly suited to systems and instrumentation were the results need to be provided digitaly, via SPI or UART.

Another unique feature is the capability of directly connecting up to 4 capacitive keys, adding 1µA of additional current.

PS09 - Circuit Block Diagram and Package Outline

Block Diagram

QFN32 Package Outline

QFN40 Package Outline

Single Chip Strain Gage Weight Measurement
The PS09 is the latest member in the PICOSTRAIN product family of integrated circuits for measuring strain gauges. It represents the next step towards higher integration and improved functional density.